Yamaha F20BMHS v3 Owner's Manual

Yamaha F20BMHS manual cover
Pages 110
Year 2017
Language(s)
English en

Yamaha F20BMHS Specification

The Yamaha F20BMHS is a portable outboard motor that combines advanced technology with user-friendly features, making it ideal for small boat owners. It features a 4-stroke, 362cc engine that delivers 20 horsepower, ensuring reliable performance and efficiency. The motor is engineered with Yamaha's renowned reliability and durability, incorporating a single overhead camshaft design that optimizes fuel efficiency and reduces emissions.

This model is equipped with a manual start system, which includes Yamaha's PrimeStartâ„¢ system, allowing for easy and quick ignition without the need for a choke. The F20BMHS also includes a manual tilt system, providing five positions to enable easy adjustment for shallow water operation and an improved boating experience. For enhanced maneuverability, the 360-degree steering capability allows for tight turns and excellent handling.

Weighing approximately 56 kilograms, the F20BMHS is designed for portability without compromising on power. The motor features a standard transom height of 15 inches, suitable for a variety of small boats. The integrated fuel tank and the option to connect an external fuel tank enhance its versatility and range.

Yamaha has incorporated several noise reduction features, including a large silencer and labyrinth exhaust, contributing to a quieter ride. Additionally, the motor includes a High-Output alternator, ensuring adequate power supply for onboard electronics and battery charging. Overall, the Yamaha F20BMHS offers a blend of performance, reliability, and convenience, making it a preferred choice for recreational and utility use on small boats.

Yamaha F20BMHS F.A.Q.

What is the recommended maintenance schedule for the Yamaha F20BMHS?

The Yamaha F20BMHS should undergo routine maintenance every 100 hours of operation or annually, whichever comes first. This includes checking and replacing the engine oil, inspecting the fuel system, cleaning the spark plugs, and examining the propeller for damage.

How do I troubleshoot starting issues with the Yamaha F20BMHS?

If the Yamaha F20BMHS is having starting issues, check the fuel supply, ensure that the fuel tank is full, and that the fuel lines are not blocked. Also, inspect the spark plugs for fouling and verify that the battery is fully charged if using an electric start.

What type of oil is recommended for the Yamaha F20BMHS?

Yamaha recommends using Yamalube 4M FC-W 10W-30 oil for optimal performance of the F20BMHS. Make sure to use oil that meets the NMMA FC-W certification.

How can I prevent corrosion on my Yamaha F20BMHS?

To prevent corrosion, rinse the outboard motor with fresh water after each use, especially after saltwater exposure. Apply a protective anti-corrosion spray to metal parts and store the motor in a dry place when not in use.

What should I do if my Yamaha F20BMHS is overheating?

If overheating occurs, check the water intake for blockages and ensure the water pump impeller is functioning properly. Also, verify the coolant passages are clear and not obstructed by debris or salt deposits.

How do I properly winterize the Yamaha F20BMHS?

To winterize the F20BMHS, drain the fuel system, stabilize the remaining fuel, change the engine oil, and apply fogging oil to the cylinders. Remove the battery and store it in a cool, dry place.

What is the procedure for changing the propeller on a Yamaha F20BMHS?

To change the propeller, remove the cotter pin and propeller nut, slide off the old propeller, and inspect the shaft for damage. Apply marine grease to the shaft, install the new propeller, secure it with the nut, and replace the cotter pin.

How can I improve fuel efficiency on the Yamaha F20BMHS?

To improve fuel efficiency, ensure the outboard is properly trimmed, maintain a steady cruising speed, and avoid carrying unnecessary weight on the boat. Regular maintenance, like keeping the propeller clean, also helps.

What are the common signs that the water pump impeller needs replacement on the Yamaha F20BMHS?

Signs that the water pump impeller needs replacement include reduced water flow from the tell-tale, engine overheating, or unusual noises from the lower unit.

How do I adjust the idle speed on my Yamaha F20BMHS?

To adjust the idle speed, locate the idle adjustment screw on the carburetor. Turn the screw clockwise to increase idle speed or counterclockwise to decrease it. Refer to the manual for the correct RPM settings.